"Mom and dad..."Giphy
Mom and dad are going to try and get us to turn on each other, if for any reason you deviate from the cover story we agreed on I will throw you under the bus so fast the bus will be totaled.
Also if you are about to go out and do something stupid and dangerous you have to let me know in case something happens to you.
You'll inherit my old stuff.
"It's been a nuclear war..."
Mutually assured destruction. It's been a nuclear war deterrent for as long as there have been nukes so there's no reason it shouldn't work on your little brother or sister.
"On family vacations..."
On family vacations, we must stick together to survive.
"There is a line..."
There is a line in the backseat of the vehicle. That side is yours, this side is mine. Cross it, and mom is being told.
"If you get in trouble..."
If you get in trouble, you DO NOT, under any circumstance, bring something up that will get your siblings in trouble too.
If mom told us to do something, but we want to slack off, we blame it on the youngest.
You cannot have the same favorite anything, whether it be a color or an animal or a character in a movie you are never allowed to like the same things.
Make sure the Younger Sibling gets some time on the Playstation, otherwise you'll hear about it at every family gathering for the rest of your life.
"If someone leaves..."
If someone leaves the room without a declaration, the TV becomes fair game. If there is a declaration, respect that otherwise it becomes anarchy. Same thing goes for seats, food, etc.